TY - JOUR AU - Yu. B. Orochko TI - Smooth approximation of selfadjoint differential operators of divergence form with bounded measurable coefficients JO - Sbornik. Mathematics PY - 1980 SP - 389 EP - 401 VL - 37 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1980_37_3_a6/ LA - en ID - SM_1980_37_3_a6 ER -